Prof Le Roux a qualified attorney and conveyancer and practised with a law firm in Cape Town before joining academia in 1994. Currently she is a professor in the Faculty of Law, and lectures mainly labour law.

In 1990 she obtained a Master's degree in International Water Law from the University of Stellenbosch, but as a result of personal interest and the demands of practice, she developed an interest in labour law. In 2000 she obtained a PG Dip (Employment Law and Social Security) from the University of Cape Town and 2002 she graduated with another Master's degree (in Sports Law) from Anglia Ruskin University. In 2008 she graduated with a PhD in labour law from the University of Cape Town.

Since 2002 she regularly published in peer-reviewed/accredited journals on both labour law and sports law issues. In 2005 she published a book Sexual Harassment in the Workplace: Law, Policies and Processes co-authored by Thandi Orleyn and Alan Rycroft. A further edition of this book, Harassment in the Workplace: Law, Policies and Processes, was published during August 2010.